(There’s also some information that suggests Olympus was suspended in the sky high above the earth and its mountains.) The entrance of Olympus was a gate made of clouds that was watched over by the seasons, and beyond were the magnificent palaces of the gods, made by Hephaestus himself - a place of paradise where its divine denizens feasted on nectar and ambrosia, where the winds never blew, rain never poured, and snow never fell.
A couple of comments before we get going: first, though he was among the most powerful gods in Greek mythology, Hades wasn’t counted among the 12 Olympians because his residence was in the underworld; second, though the 12 Olympians were the greatest of the gods who lived atop Olympus, they weren’t the only gods who called Olympus home; others included: Hebe, the goddess of youth, Iris, the goddess of rainbows, the three graces, the nine muses, and many others. Third, while 11 of the 12 Olypians (Zeus, Poseidon, Hera, Demeter, Athena, Ares, Apollo, Artemis, Aphrodite, and Hermes) are chiselled in stone, Dionysus and Hestia sort of shared that 12th spot, different listings featuring one or the other. I’ve decided to honour both, meaning our list of Olympians actually comprises 13 gods.